Recent content by Thevan

Thank You Chester. On a similar topic, is it possible that critical radius of insulation does not exist in certain scenarios (certain types of cylinder material or insulation)? Or is critical radius applicable for all insulated cylindrical structures in heat transfer?

I'm going with finite parameters. Below are the parameters, for your reference. Concrete wall of height 5m, length 4m and thickness 0.25m. The metal pipe is embedded in the wall along the length. Length of pipe is 4m, internal radius 0.02m and outer radius 0.03m. Pipe has insulation of...

A steel pipe with foam insulation is embedded in a concrete wall. The steel pipe is carrying cold water and therefore gains heat from outside atmosphere. Heat transfers through the concrete wall, foam insulation and then to the pipe. Is it possible to calculate critical radius of insulation for...

The distance/difference between two points in spacetime can be written in two forms (as shown in attachment). Can anyone explain the difference in the two equations? I have read that the two equations are the same, but i don't understand the change in sign. Why is it written in two forms...